Microjoule is 0.000001 joule units.
Microjoules to Nanojoules Converter — uJ to nJ
Convert Microjoule (uJ) to Nanojoule (nJ) using the exact conversion factor (1 microjoule = 1,000 nanojoule). See the formula, worked examples, and conversion table.
Microjoules to Nanojoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Nanojoule is 1e-9 joule units.
Result = input x 1e-6 / 1e-9.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Microjoules to Nanojoules
Microjoule and Nanojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Microjoule is 0.000001 joule units, and nanojoule is 1e-9 joule units.
Formula
nanojoules = microjoules × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 microjoule equals 0.000001 base units, and 1 nanojoule equals 1e-9 base units, so dividing one by the other gives the direct microjoule-to-nanojoule factor of 1000.
Simple example
1 uJ × 1000 = 1,000 nJ
1 microjoule = 1,000 nanojoules.
Real-world example
100 uJ × 1000 = 100,000 nJ
100 microjoules = 100,000 nanojoules.
Conversion table
| Microjoule (uJ) | Nanojoule (nJ) |
|---|---|
| 1 uJ | 1,000 nJ |
| 10 uJ | 10,000 nJ |
| 100 uJ | 100,000 nJ |
| 500 uJ | 500,000 nJ |
| 1,000 uJ | 1,000,000 nJ |
| 2,000 uJ | 2,000,000 nJ |
Reverse conversion: Nanojoule to Microjoule
1 nJ × 0.001 = 0.001 uJ
1 nanojoule = 0.001 microjoules.
microjoules = nanojoules × 0.001
For a page dedicated to this direction, see Nanojoule to Microjoule.
Understanding the Microjoule (uJ)
Microjoule is 0.000001 joule units.
Understanding the Nanojoule (nJ)
Nanojoule is 1e-9 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanojoules are in 1 microjoule?
1 microjoule equals 1,000 nanojoules, using the exact defined conversion factor rather than an estimate.
How do I convert microjoule to nanojoule?
Multiply the microjoule value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert nanojoule back to microjoule?
Use the reverse factor: 1 nanojoule equals 0.001 microjoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a microjoule?
Microjoule (uJ) is a unit of energy.
What is a nanojoule?
Nanojoule (nJ) is a unit of energy.
Is the microjoule to nanojoule conversion exact?
Yes. Both microjoule and nanojoule are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.